RFID reader , Open your door without contact using an RFID chip or card. You can also conveniently lock cards or chips, 4D motion detector / sensor , Instead of a normal motion detector, this motion detector works with high frequency better detection rate!, 2x bi-stable self-holding switching relay – potential free (For two families – house or garage door, etc.), Each residential party can have their own door entrance – this can be opened via the APP / intercom.